A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

Which of the graphs below correctly solves for x in the equation x^2 − 4x + 3 = x + 3?

  • This Question is Closed
  1. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    1 Attachment
  2. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    1 Attachment
  3. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i have plugged the x coordinates of the points in the x of the function and only graph that has the point (0,3) and (5,8) work and made both sides equal .. and that's answer choices A , B and , C so please help me.

  4. lulubj
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    http://assets.openstudy.com/updates/attachments/557a2a37e4b0636b8cc2f7da-doshka_syria-1434069633043-screenshot_1.png the second one here

  5. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @jim_thompson5910 @Luigi0210 @peachpi @ryamorgan284

  6. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Yes , i have uploaded them in order .. first one A and B and second one is C and D

  7. lulubj
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Then, D

  8. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    How? -5 doesn't work if you plug it in the function it doesn't make both sides equal.

  9. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    this question only concerns the x-values... \[x^2-4x+3=x+3\]

  10. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    we know 0 would work because \[(0)^2-4(0)+3=0+3 \] \[3=3\] but since there are multiple coordinates, we need to figure out if there is more than one x value that satisfies the equation

  11. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    there's 2 intersections... for your choices... so there's more than 1 common point

  12. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    right, and i have done that and only the points (0,3) and (5,8) do satisfie that function

  13. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    \[(5)^2-4(5)+3=5+3\] \[25-20+3=5+3\] \[5+3=5+3 \rightarrow 8=8\] yeah that's correct...

  14. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    \[(-5)^2-4(-5)+3=-5+3\] \[25+20+3 \neq -2\] \[48 \neq -2\]

  15. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i think it's the second graph because if you only graph f(x) = x+3 it will only give you a linear graph that it's line only matches the second one and the last one but since the last one doesn't satisfie the function it's not correct and it's B

  16. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    it is the second graph.. the coordinates of (0,3) and(5,8)

  17. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    the mistake that i have made when i tried to graph it .. i graphed it like this f(x)=x2 − 4x + 3 = x + 3 .. i should have done the left side as one graph and the second one as another graph and see the final image.

  18. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Thanks a lot for your time and help. @UsukiDoll

  19. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    oh... you have to split them up like f(x) = x+3 f(x) = x^2-4x+3 and compare the two together to see if there's a common point.

  20. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    aha , and that's what i did and the end

  21. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    it helps to make a table like x f(x) = x+3 f(x) =x^2-4x+3 0 3 3 1 4 0

  22. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    that's how i knew B and those two points match and the others don't

  23. UsukiDoll
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    whenever you see the same number... it's a solution to both f(x) =x+3 and f(x) = x^2-4x+3

  24. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Yes.

  25. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.